Studies performed on human blood cells have shown that Thymuskin stimulates lymphocytes to divide. This effect was dependent on the concentration administered, and was statistically significant compared with the untreated group (p=0.03). The mechanism behind this stimulation is unrelated to interleukins.1 The increased proliferation of lymphocytes is most likely connected to immunological regulation and modulation of hair growth. Autoimmune processes play a particular role in alopecia areata.